Recent content by quasimodo

dont know the 820 code.. 27" 2011 machine of a strong smoker... image is present - only backlight is missing. backlight turns on for 1 second on boot, then shuts off..

Hey, any idea for this problem? iMac 27" 2011 Backlight not working. Graphics good, iMac boots, externally fully functional. The backlight turn on for 1 second when i press the power button - then shuts off. LED driver board is replaced. Same problem. Any ideas?

Q3501 was causing short - crazy. this was a new chip. replaced with new one and its running.

chimes, after few seconds turns off, restarts again...

Hey guys, got a strange iMac here. From 2017. No image/video. When LCD is connected, all 4 LEDs are going on. LCD disconnected - 3 LEDs are on. iMac chimes, Backlight is turning on, fan is spinning. LCD fuse is ok. Heating up GPU? RAM? Whats going on with this machine?

just changed internal LCD cable - everything is there. jesus with us.

3v is there, 5v is there DP_INT_HPD is not there. 0V

Hey guys, got a strange board here. MacBook dropped on floor / no liquid damage. Thought it was a bad lcd. chimes/boots/works externally. replaced LCD screen - no difference. pram reset/dfu - nothing. where to start?

3 - 3.2 OHM on L7211/21/31 7 OHM on L7410/20 0.3 OHM at ppbus_g3h

on C658X? yes. can you tell me where to measure?

this is the resistance to ground on ppbus_g3h...

okay. resistance is 0.02 / 0.03 OHM, almost nothing

yep, everything beeps C3500 looks like shit, beeps too

diode mode beeps on ppbus_g3h / 0 R7020 all 4 pins, 5V